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BIM Basics
What is BIM?
A 3D model where every element knows what it is — and a way of working that keeps drawings, quantities and site instructions in agreement.
4 min read
The short definition
- BIM stands for Building Information Modeling.
- It is a 3D digital model of a building where each element carries data: size, material, grade, type, level and cost code.
- Drawings, schedules and quantities are generated from that model instead of being drawn separately.
- It is a process as much as a file — how the design team, client and site team share one source of truth.
What 'information' actually means
- A wall is not four lines — it is a 230 mm brick wall with plaster, a fire rating and a finish.
- A column knows its size, concrete grade and the floor it belongs to.
- A door knows its type, size, frame and hardware set, so a door schedule writes itself.
- Change the wall thickness once and every plan, section and quantity updates together.
What a BIM deliverable typically contains
- Discipline models (architectural, structural, MEP)
- A coordinated federated model
- Working drawing sheets in PDF and DWG
- Schedules and quantity take-offs
- Clash and coordination reports
- Renders or a walkthrough where required
Who uses it
- Owners, to see and approve decisions early
- Architects and consultants, to coordinate design
- Contractors, to plan sequence and material
- Site engineers, to build from drawings that agree with each other
Have a project question?
Send your drawings or plot details and we will tell you plainly what BIM would change for your project.